Chinese Journal of Agrometeorology ›› 2015, Vol. 36 ›› Issue (04): 506-512.doi: 10.3969/j.issn.1000-6362.2015.04.015

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Regularity of Heat Injury During Whole Growth Season of Middle Rice in Anhui Province

CHU Rong-hao, SHEN Shuang-he, LI Meng, SHAO Li-ying, GAO Lei   

  1. 1.College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China; 2.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster of Nanjing University of Information Science & Technology, Nanjing 210044
  • Received:2015-01-26 Online:2015-08-20 Published:2015-10-19

Abstract: Based on the conventional meteorological data from 1961 to 2013 and middle rice yield data from 1980 to 2011 in Anhui province, by using the mathematical statistics, Morlet wavelet analysis and spatial analysis function of ArcGIS, the temporal and spatial variation of rice heat injury with different grades in Anhui province was analyzed. The results showed that the occurrence frequency of heat injury during whole growth season of middle rice concentrated mainly to mid-to-end of July and early August, especially in early August from 1961 to 2013. The slight, moderate and severe heat-injury was occurred every 2.15 years, 3.81 years and 4.69 years, respectively. All grades of heat-injury occurrence frequency showed an increasing trend after decreasing during last 53 years, and the least was in 1980s. All grades of heat injury frequency showed a periodic variation at the rate of 48, 28, and 12 years. The high frequency value was in the southern of Aihui province, especially in Anqing city. However, the correlation between yield of middle rice and heat injury frequency was not significant.

Key words: Anhui province, Middle rice, Heat injury, Regularity